A dart game apparatus 100 is provided with: a dart board in which a dart can stick and a plurality of segments are demarcated; a first detecting part 100 that detects a position of a point where the dart stuck in the dart board; a second detecting part 102 that detects a segment of the point where the dart stuck from the plurality of segments; a correcting part 104 that corrects the position detected by the first detecting part 100 based on the segment detected by the second detecting part 102 if a segment corresponding to the position detected by the first detecting part 100 is different from the segment detected by the second detecting part 102; and an outputting part 106 that output the position detecting by the first detecting part 100 or position corrected by the correcting part 104.

Apparatus and methods for removing leakage from a qubit. In one aspect, an apparatus includes one or more qubits, wherein each qubit facilitates occupation of at least one of a plurality of qubit levels, the qubit levels including two computational levels and one or more non-computational levels that are each higher than the computational levels, wherein the qubit facilitates transitions between qubit levels associated with a corresponding transition frequency; a cavity, wherein the cavity defines a cavity frequency; one or more couplers coupling each qubit to the cavity; one or more couplers coupling the cavity to an environment external to the one or more qubits and the cavity; a frequency controller that controls the frequency of each qubit such that, for each qubit, the frequency of the qubit is adjusted relative to the cavity frequency such that a population of a non-computational level is transferred to the cavity.

Apparatus and methods for removing leakage from a qubit. In one aspect, an apparatus includes one or more qubits, wherein each qubit facilitates occupation of at least one of a plurality of qubit levels, the qubit levels including two computational levels and one or more non-computational levels that are each higher than the computational levels, wherein the qubit facilitates transitions between qubit levels associated with a corresponding transition frequency; a cavity, wherein the cavity defines a cavity frequency; one or more couplers coupling each qubit to the cavity; one or more couplers coupling the cavity to an environment external to the one or more qubits and the cavity; a frequency controller that controls the frequency of each qubit such that, for each qubit, the frequency of the qubit is adjusted relative to the cavity frequency such that a population of a non-computational level is transferred to the cavity.

Gravity resetting range targets include rotatable target plates that rotate around a rotation axis extending through a fixed target body. The rotatable target plates rotate 360 degrees around the rotation axis and through a target plate aperture of the fixed target body, resetting to a ready position using gravity forces acting on the weight of the rotatable target plates. High visibility hit indicators include long-range hit indicators rotatably mounted to the fixed target body opposite the rotatable target plate such that the long-range hit indicator rotates around the rotation axis substantially 180 degrees from the rotatable target plate. The rotatable target plates are cut from the fixed target bodies within a single piece of material and remain connected via tabs until assembly is desired.

Gravity resetting range targets include rotatable target plates that rotate around a rotation axis extending through a fixed target body. The rotatable target plates rotate 360 degrees around the rotation axis and through a target plate aperture of the fixed target body, resetting to a ready position using gravity forces acting on the weight of the rotatable target plates. High visibility hit indicators include long-range hit indicators rotatably mounted to the fixed target body opposite the rotatable target plate such that the long-range hit indicator rotates around the rotation axis substantially 180 degrees from the rotatable target plate. The rotatable target plates are cut from the fixed target bodies within a single piece of material and remain connected via tabs until assembly is desired.

Apparatus and methods for removing leakage from a qubit. In one aspect, an apparatus includes one or more qubits, wherein each qubit facilitates occupation of at least one of a plurality of qubit levels, the qubit levels including two computational levels and one or more non-computational levels that are each higher than the computational levels, wherein the qubit facilitates transitions between qubit levels associated with a corresponding transition frequency; a cavity, wherein the cavity defines a cavity frequency; one or more couplers coupling each qubit to the cavity; one or more couplers coupling the cavity to an environment external to the one or more qubits and the cavity; a frequency controller that controls the frequency of each qubit such that, for each qubit, the frequency of the qubit is adjusted relative to the cavity frequency such that a population of a non-computational level is transferred to the cavity.

Apparatus and methods for removing leakage from a qubit. In one aspect, an apparatus includes one or more qubits, wherein each qubit facilitates occupation of at least one of a plurality of qubit levels, the qubit levels including two computational levels and one or more non-computational levels that are each higher than the computational levels, wherein the qubit facilitates transitions between qubit levels associated with a corresponding transition frequency; a cavity, wherein the cavity defines a cavity frequency; one or more couplers coupling each qubit to the cavity; one or more couplers coupling the cavity to an environment external to the one or more qubits and the cavity; a frequency controller that controls the frequency of each qubit such that, for each qubit, the frequency of the qubit is adjusted relative to the cavity frequency such that a population of a non-computational level is transferred to the cavity.

Gravity resetting range targets include rotatable target plates that rotate around a rotation axis extending through a fixed target body. The rotatable target plates rotate 360 degrees around the rotation axis and through a target plate aperture of the fixed target body, resetting to a ready position using gravity forces acting on the weight of the rotatable target plates. High visibility hit indicators include long-range hit indicators rotatably mounted to the fixed target body opposite the rotatable target plate such that the long-range hit indicator rotates around the rotation axis substantially 180 degrees from the rotatable target plate. The rotatable target plates are cut from the fixed target bodies within a single piece of material and remain connected via tabs until assembly is desired.

Gravity resetting range targets include rotatable target plates that rotate around a rotation axis extending through a fixed target body. The rotatable target plates rotate 360 degrees around the rotation axis and through a target plate aperture of the fixed target body, resetting to a ready position using gravity forces acting on the weight of the rotatable target plates. High visibility hit indicators include long-range hit indicators rotatably mounted to the fixed target body opposite the rotatable target plate such that the long-range hit indicator rotates around the rotation axis substantially 180 degrees from the rotatable target plate. The rotatable target plates are cut from the fixed target bodies within a single piece of material and remain connected via tabs until assembly is desired.

Apparatus and methods for removing leakage from a qubit. In one aspect, an apparatus includes one or more qubits, wherein each qubit facilitates occupation of at least one of a plurality of qubit levels, the qubit levels including two computational levels and one or more non-computational levels that are each higher than the computational levels, wherein the qubit facilitates transitions between qubit levels associated with a corresponding transition frequency; a cavity, wherein the cavity defines a cavity frequency; one or more couplers coupling each qubit to the cavity; one or more couplers coupling the cavity to an environment external to the one or more qubits and the cavity; a frequency controller that controls the frequency of each qubit such that, for each qubit, the frequency of the qubit is adjusted relative to the cavity frequency such that a population of a non-computational level is transferred to the cavity.